ra·di·o·paque 
(rā′dē-ō-pāk)
(rā′dē-ō-pāk)adj.
Not allowing the passage of x-rays or other radiation.
ra′di·o·paci·ty (-ō-păsĭ-tē) n.
- spectroscopically
- spectroscopic analysis
- spectroscopic binary
- spectroscopist
- spectroscopy
- spectrum
- specula
- specular
- specularly
- speculate
- speculation
- speculative
- speculatively
- speculator
- speculum
- sped
- speech
- speech act
- speech community
- speechifier
- speechify
- speechless
- speechlessly
- speechlessness
- speechmaker